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Cornillot E, Dassouli A, Pachikara N, Lawres L, Renard I, Francois C, Randazzo S, Brès V, Garg A, Brancato J, Pazzi JE, Pablo J, Hung C, Teng A, Shandling AD, Huynh VT, Krause PJ, Lepore T, Delbecq S, Hermanson G, Liang X, Williams S, Molina DM, Ben Mamoun C. A targeted immunomic approach identifies diagnostic antigens in the human pathogen Babesia microti. Transfusion 2016; 56:2085-99. [PMID: 27184823 PMCID: PMC5644385 DOI: 10.1111/trf.13640] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 03/24/2016] [Accepted: 03/30/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND Babesia microti is a protozoan parasite responsible for the majority of reported cases of human babesiosis and a major risk to the blood supply. Laboratory screening of blood donors may help prevent transfusion-transmitted babesiosis but there is no Food and Drug Administration-approved screening method yet available. Development of a sensitive, specific, and highly automated B. microti antibody assay for diagnosis of acute babesiosis and blood screening could have an important impact on decreasing the health burden of B. microti infection. STUDY DESIGN AND METHODS Herein, we take advantage of recent advances in B. microti genomic analyses, field surveys of the reservoir host, and human studies in endemic areas to apply a targeted immunomic approach to the discovery of B. microti antigens that serve as signatures of active or past babesiosis infections. Of 19 glycosylphosphatidylinositol (GPI)-anchored protein candidates (BmGPI1-19) identified in the B. microti proteome, 17 were successfully expressed, printed on a microarray chip, and used to screen sera from uninfected and B. microti-infected mice and humans to determine immune responses that are associated with active and past infection. RESULTS Antibody responses to various B. microti BmGPI antigens were detected and BmGPI12 was identified as the best biomarker of infection that provided high sensitivity and specificity when used in a microarray antibody assay. CONCLUSION BmGPI12 alone or in combination with other BmGPI proteins is a promising candidate biomarker for detection of B. microti antibodies that might be useful in blood screening to prevent transfusion-transmitted babesiosis.
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Affiliation(s)
- Emmanuel Cornillot
- Institut de Biologie Computationnelle (IBC), Institut de Recherche en Cancérologie de Montpellier (IRCM-INSERM U1194), Institut régional du Cancer Montpellier (ICM) and Université de Montpellier, Montpellier, France
| | - Amina Dassouli
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut
- Laboratoire de Biologie Cellulaire et Moléculaire (LBCM-EA4558 Vaccination Antiparasitaire), UFR Pharmacie, Université de Montpellier, Montpellier, France
| | - Niseema Pachikara
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut
| | - Lauren Lawres
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut
| | - Isaline Renard
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut
| | - Celia Francois
- Laboratoire de Biologie Cellulaire et Moléculaire (LBCM-EA4558 Vaccination Antiparasitaire), UFR Pharmacie, Université de Montpellier, Montpellier, France
| | - Sylvie Randazzo
- Laboratoire de Biologie Cellulaire et Moléculaire (LBCM-EA4558 Vaccination Antiparasitaire), UFR Pharmacie, Université de Montpellier, Montpellier, France
| | - Virginie Brès
- Laboratoire de Biologie Cellulaire et Moléculaire (LBCM-EA4558 Vaccination Antiparasitaire), UFR Pharmacie, Université de Montpellier, Montpellier, France
| | - Aprajita Garg
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut
| | - Janna Brancato
- Division of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut
| | | | | | - Chris Hung
- Antigen Discovery, Inc., Irvine, California
| | - Andy Teng
- Antigen Discovery, Inc., Irvine, California
| | | | | | - Peter J. Krause
- Division of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut
| | - Timothy Lepore
- Division of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut
| | - Stephane Delbecq
- Laboratoire de Biologie Cellulaire et Moléculaire (LBCM-EA4558 Vaccination Antiparasitaire), UFR Pharmacie, Université de Montpellier, Montpellier, France
| | | | | | - Scott Williams
- Connecticut Agricultural Experiment Station, New Haven, Connecticut
| | | | - Choukri Ben Mamoun
- Department of Internal Medicine, Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut
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A systems biology approach for diagnostic and vaccine antigen discovery in tropical infectious diseases. Curr Opin Infect Dis 2016; 28:438-45. [PMID: 26237545 DOI: 10.1097/qco.0000000000000193] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW There is a need for improved diagnosis and for more rapidly assessing the presence, prevalence, and spread of newly emerging or reemerging infectious diseases. An approach to the pathogen-detection strategy is based on analyzing host immune response to the infection. This review focuses on a protein microarray approach for this purpose. RECENT FINDINGS Here we take a protein microarray approach to profile the humoral immune response to numerous infectious agents, and to identify the complete antibody repertoire associated with each disease. The results of these studies lead to the identification of diagnostic markers and potential subunit vaccine candidates. These results from over 30 different organisms can also provide information about common trends in the humoral immune response. SUMMARY This review describes the implications of the findings for clinical practice or research. A systems biology approach to identify the antibody repertoire associated with infectious diseases challenge using protein microarray has become a powerful method in identifying diagnostic markers and potential subunit vaccine candidates, and moreover, in providing information on proteomic feature (functional and physically properties) of seroreactive and serodiagnostic antigens. Combining the detection of the pathogen with a comprehensive assessment of the host immune response will provide a new understanding of the correlations between specific causative agents, the host response, and the clinical manifestations of the disease.
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